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Posted to dev@hive.apache.org by Simanchal Das <si...@outlook.com> on 2017/04/22 11:03:29 UTC
Re: Review Request 53845: 'like any' and 'like all' operators in hive
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/53845/
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(Updated April 22, 2017, 11:03 a.m.)
Review request for hive, Carl Steinbach and Vineet Garg.
Repository: hive-git
Description
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https://issues.apache.org/jira/browse/HIVE-15229
In Teradata 'like any' and 'like all' operators are mostly used when we are matching a text field with numbers of patterns.
'like any' and 'like all' operator are equivalents of multiple like operator like example below.
--like any
select col1 from table1 where col2 like any ('%accountant%', '%accounting%', '%retail%', '%bank%', '%insurance%');
--Can be written using multiple like condition
select col1 from table1 where col2 like '%accountant%' or col2 like '%accounting%' or col2 like '%retail%' or col2 like '%bank%' or col2 like '%insurance%' ;
--like all
select col1 from table1 where col2 like all ('%accountant%', '%accounting%', '%retail%', '%bank%', '%insurance%');
--Can be written using multiple like operator
select col1 from table1 where col2 like '%accountant%' and col2 like '%accounting%' and col2 like '%retail%' and col2 like '%bank%' and col2 like '%insurance%' ;
Problem statement:
Now a days so many data warehouse projects are being migrated from Teradata to Hive.
Always Data engineer and Business analyst are searching for these two operator.
If we introduce these two operator in hive then so many scripts will be migrated smoothly instead of converting these operators to multiple like operators.
Diffs (updated)
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ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java 8dc5f2e
ql/src/java/org/apache/hadoop/hive/ql/parse/HiveLexer.g 0721b92
ql/src/java/org/apache/hadoop/hive/ql/parse/HiveParser.g d98a663
ql/src/java/org/apache/hadoop/hive/ql/parse/IdentifiersParser.g 8598fae
ql/src/java/org/apache/hadoop/hive/ql/parse/TypeCheckProcFactory.java 8f8eab0
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFLikeAll.java PRE-CREATION
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFLikeAny.java PRE-CREATION
ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDFLikeAll.java PRE-CREATION
ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDFLikeAny.java PRE-CREATION
ql/src/test/queries/clientnegative/udf_likeall_wrong1.q PRE-CREATION
ql/src/test/queries/clientnegative/udf_likeany_wrong1.q PRE-CREATION
ql/src/test/queries/clientpositive/udf_likeall.q PRE-CREATION
ql/src/test/queries/clientpositive/udf_likeany.q PRE-CREATION
ql/src/test/results/clientnegative/udf_likeall_wrong1.q.out PRE-CREATION
ql/src/test/results/clientnegative/udf_likeany_wrong1.q.out PRE-CREATION
ql/src/test/results/clientpositive/show_functions.q.out ac5ca41
ql/src/test/results/clientpositive/udf_likeall.q.out PRE-CREATION
ql/src/test/results/clientpositive/udf_likeany.q.out PRE-CREATION
Diff: https://reviews.apache.org/r/53845/diff/9/
Changes: https://reviews.apache.org/r/53845/diff/8-9/
Testing
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Junit test cases and query.q files are attached
Thanks,
Simanchal Das